Nut-lock.



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UNITED STATES PATENT OFFICE.

THOMAS WASHINGTON CROZIER, OF CHRISTIANSBURG, VIRGINIA, ASSIGNOR OFONE-FOURTH TO GEORGE W. MITCHELL AND ONE-FOURTH TO WILLIAM WALL, OFCHRISTIANSBURG,

VIRGINIA.

NUT-LOCK.

Patented June 2, `1908.

Application filed February 29, 1908. Serial No. 418,502.

' To all whom 'it may concern:

Be it known that I, THoMAsW. CROZIER, a citizen of the United States,residing at Ohristiansburg, in the county of Montgomery and State ofVirginia, have invented a new and useful Nut-Lock, of which thefollowing is a specification.

This invention relates to nut locks and more particularly to meanswhereby the bolt as well as the nut can be secured against rotation.

One of the objects of the invention is to provide a lock which willsecurely fasten the bolt and nut against relative movement Without thenecessity of providing either a bolt or a nut of special construction.V

A further object is to provide locking means the efficiency of which isincreased in proportion to the degree to which the nut is tightened,said means being designed to bite into the nut and bolt and thus act asa key to bind them together` With these and other objects in view theinvention consists of certain novel features of construction andcombinations of parts which will be hereinafter more fully described andpointed out in the claims.

In the accompanying drawings is shown the preferred form of theinvention.

In said drawings: Figure l is a section through a nut lock embodying thepresent improvements; Fig. 2 is a perspective view of the Washer of thelock. Fig. 3 is a plan view of said washer and showing the locking keypositioned therein. Fig. 4 is a detail view of said key.

Referring to the figures by characters of reference, 1 designates awasher of any desired contour and having a bolt opening 2 while one faceof said washer is provided with a recess 3, the bottom of which isinclined relative to the face of the washer. This recess opens into4 thebolt opening and constitutes a seat for a locking key consisting of awedge-like lock 4, the bottom of which is smooth and designed to bearagainst the bottom of the recess 3 while the top of said key has teeth5` extending backward thereacross. The thick end of the block isconcaved from side to side as indicated at 6 and vprovided with teeth 7designed to project into the opening 2 when the key is in bolt engagingposition.

hAs indicated in the drawings the teeth 7 are preferably V-shaped whileeach tooth 5 preferably has that face thereof nearest the u teeth 7perpendicular to the face of the key as indicated particularly inFig. 1. A bolt of any ordinary construction has been indicated at 8 anda nut of the usual form.v has been designated at 9. When it is desiredto secure the nut upon the bolt the Washer 1 is placed upon the boltafter said bolthas been inserted through the parts 10 to be secured. Thekey lis then seated in recess 3 and the nut 9 screwed thereagainst.Asthe teeth 5 are arranged diagonally upon the outer face of the key thenut will move thereover without being engaged thereby to anobjectionable extent and will at the same time force the key downwardagainst the inclined bottom of the recess which will in turn deflect thekey toward the bolt so that the teeth 7 will bite into the bolt. It willbe apparent of course that the tighter the nut screws upon the bolt andagainst the key the more firmly said key will bite into the bolt. Byreason of the peculiar disposition of the teeth 5 they will serve toengage the nut and prevent it from unscrewing from the bolt. It willthus be seen that by utilizing the washer 1 and key 4 nuts and bolts ofordinary construction can be securely locked together and prevented fromrotating independently of each other. f Whatis claimed is:

1. A nut and bolt lock comprising a Washer having a bolt receivingaperture and a recess in one face of the washer and o ening into saidaperture, and a key movab e bodily in one 'direction within therecessesradially of the a erture, said key having toothed surfaces orprojecting beyond the recessed face of the washer and into the boltaperture respectively.

2. In a nut and bolt lock comprising a washer having a bolt receivingopening, one face of said washer having an angulary recess with aninclined bottom, said recess opening into the bolt opening, and awedge-like locking key movable bodily Within the recess radially of thebolt opening and having teeth disposed to pro'ect into the bolt opening.

3. In a nut lock the combination with a Washer having a bolt receivingopening therein, there being an angular recess in one face disposed tobe deflected by the inclined Wall into the opening, that end of the keymovable into the opening being provided with bolt engaging teeth.

4. In a nut lock the combination With a Washer having a bolt receivingopening, there being an angular recess in one face of the Washer andcommunicating With said opening, the bottom Wall of the recess beinginclined; of a Wedge-like key slidable bodily upon and disposed to bedeflected longitudinally by said inclined Wall, said key being movablebodily in one direction radially of the bolt opening and having teethupon one end and one face for engagement with a bolt and nutrespectively.

5. The combination with a bolt and a nut thereon; of a Washer having anopening and mounted upon the bolt and having an angular recess in oneface communicating with the bolt opening, said recess being providedWith an inclined bottom Wall, and a locking key movably mounted upon theinclined Wall of the recess and having teeth for engagement With thebolt and nut respectively, said key being bodily movable in onedirection radially of the bolt opening.

6. The combination With a bolt, and a inclined Wall of the recess, saidkey having bolt engaging teeth at one end and diagonally disposed nutengaging teeth upon one face, and a nut bearing against the key to shiftit upon the inclined Wall of the recess and into engagement with thebolt.

In testimony that I claim the foregoing as my own, I have hereto afliXedmy signature in the presence of tWo Witnesses.

THOMAS WASHINGTON CROZIER.

Witnesses:

ARCHER P. JOHNSON, R. I. Rooi.

